1.1 Consider a mixture of 1.5 mol benzene and 1.7 mol methylbenzene, which behaves like an ideal solution at constant temperature and pressure. RT = 2.48 kJ/mol. i) [3] ii) iii) Calculate the molar entropy of mixing Calculate the molar Gibbs energy of mixing. Conclude justifiably whether the two substances readily mix or not. [3] [3] 1.2 Write down the definition of heat capacity at constant pressure. 1.3 Sketch a graph illustrating the definition in 1.2. [3]